Agenda Date: 05/05/2026
Subject:
Title
Resolution 21-2026: Approving the first amendment to the Intergovernmental Agreement between the City of Littleton and Mile High Flood District regarding funding of Major Drainageway Planning and Flood Hazard Area Delineation for Slaughterhouse Gulch
Body
From:
James L. Becklenberg, City Manager
Prepared by:
Brent Soderlin, Director of Public Works and Utilities
Sarah White, Water Resources Manager
Presentations:
N/A
PURPOSE:
Approving the first amendment to the Intergovernmental Agreement (IGA) with Mile High Flood District for funding of Major Drainageway Plan and Flood Hazard Area Delineation for Slaughterhouse Gulch.
LONG-TERM OUTCOME(S) SERVED:
Sustainable Community with Natural Beauty; High-Quality Governance
DISCUSSION:
The City of Littleton entered into an Intergovernmental Agreement with Mile High Flood District (MHFD) on August 20, 2024 to undertake master planning and floodplain delineation on Slaughterhouse Gulch. As work has progressed on this Master Planning Study and the associated hydrology, additional funding needs are needed to complete the studies. Project costs are slightly higher than originally anticipated due to 4 main components:
1. Rising Study Costs - These increases are in line with those that we are seeing across the industry with design and construction costs as well. Moving forward we will be starting projects with a higher beginning cost to address these increases. This project and associated assumed funding was from the 2020 5-year Plan and labor costs have increased significantly since then.
2. Detailed Hydrologic Modeling - The Slaughterhouse Gulch study includes a more robust hydrologic analysis than assumed when originally funding the study. Because Slaughterhouse Gulch consists of both above and below ground (piped) segments, it was necessary to model the area with both a traditional analysis for the open channel flow and also to do a more robust model for the piped secti...
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